Problem description:
Thank you for your enthusiastic response.
Analysis:
A remote controller is a device used to remotely control a machine. Modern remote controllers are mainly composed of integrated circuit boards and buttons for generating different information.
It is impossible to test who invented the first remote control. But the earliest remote controller was invented by an inventor named nikola tesla (1856- 1943) (he used to work for Edison, also known as a genius inventor) in 1898 (U.S. patent number. 6 13809). It is called "method and device for controlling moving vehicles or vehicle machinery".
The earliest remote controller used to control TV was Zenith (now acquired by LG), an American electrical appliance company developed in the 1950s. It was wired at the earliest. 1955, the company developed a wireless remote control device named "Flashmatic". But this device can't tell whether the light beam comes from the remote control, and it must be aligned to control it. 1956, robert adler developed a remote controller called "zenith space command", which is also the first modern wireless remote control device. He uses ultrasonic waves to adjust the channel and volume. The frequency of each key is different, but this device may also be interfered by ordinary ultrasonic waves. Some people and animals (such as dogs) can hear the sound from the remote control.
In the1980s, when the semiconductor device for sending and receiving infrared rays was developed, it gradually replaced the ultrasonic control device. Even with the development of other wireless transmission methods (such as Bluetooth), this technology continues to be widely used until now.